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Modem Signal and Line States
Signal and Line State Diagrams
DC-161
Cisco IOS Dial Technologies Configuration Guide
Figure 27 EXEC and Daemon Creation for Incoming and Outgoing Calls
Note If your system incorporates dial-out modems, consider using access lists to prevent unauthorized use.
Configuring a Line Timeout Interval
To change the interval that the Cisco IOS software waits for the CTS signal after raising the DTR signal
in response to the DSR (the default is 15 seconds), use the following command in line configuration
mode. The timeout applies to the modem callin command only.
Note The DSR signal is called RING on older ASM-style chassis.
Hang up
Idle state
CTS raised
high,
watching
DTR
CTS
CTS lowered or
network
connection
closed
CTS lowered
high,
watching
DTR
CTS
Close connection,
DTR low for
5 seconds
high,
watching
DTR
CTS
Incoming network
connection
DTR going
low
high,
watching
DTR
CTS
Create
daemon
User-typed
activation
character
Create
EXEC
Ready
Ready
and
active
Ready
and
active
CTS lowered
or exit
S1004a
Command Purpose
Router(config-line)# modem answer-timeout seconds
Configures modem line timing.